Quirky math problem.?

ume you rode in airplanes every day. How many years would it take you before you had a statistical probability of crashing aboard one? You'd be playing Russian roulette but there would be a lot of chambers and only one bullet. Basically I want to know how many chambers. I just want an answer like "You COULD die today and you COULD live forever but you would PROBABLY be safe for 127 years."